Door



July 8, 1930. v B'.Y B. WHITTAM I 9,

, noon 1 Filed April 6, 1926 6 Sheets-Sheet l July 8,1930. B. B. WHITTAM' noon Filed April 6, 1926 6 Sheets-Sheet 3 MZM ATTORNEYS July 8, 1930. B. B. WHITTAM DOOR Filed April 6, 1926 6 Sheets-Sheet 4 Wm aw? A ATTORNEY:

Jul 8, 1930.

B. B. WHITTAM DOOR s Sheets-Sheet 5 Filed April 6. 1926 @M a mvwoR BY e /n w ATTORNEYS July 8, 1930.

B. B. WHITTAM DOOR Filed April 6, 1926 8 Sheets-Sheet 6 7 BY WMATTQRNEY Patented July 8, 1930 UNITED STATES PATENT OFFICE BENJAMIN 1B. WHITTAM, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE BAIBGOGK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A. CORPORATION OF NEW JERSEY :ooon

Application filed. April 6,

This invention relates to doors that are of position in front of openings that are made in furnace walls, through which steam lances or the like may be inserted for cleaning the tubes of water tube boilers, although it is not restricted to this particular use.

The invention will be understood from the description in connection with the accompanyin drawings, in which Fig. 1 is a front view the door; Fig. 2 is a section along the line 22 of Fig. 1; Fig. 3 is a similar view showing the door in a different position; Fig. 4 is a section along the line of Fig. 1; Fig. 5 is a section similar to Fig. 3 showing a modification; Fig. '6 is a. vertical section through the modification; Fig. 7 1s a side view of a second modification; Fig. 8 is a horizontal section through the same, and Fig. 9 is a vertical section thereof. In the drawings, reference character 10 indicates a flanged casing in which the door may be set, this casing being mounted in the outer wall of a boiler furnace, for example, and with the flanges extending outwardly, as shown.

hollow doorl]. of metal is filled with a packing 12 of insulating material, the door being provided with flanges 13 and flanged ribs 14 to keep the insulating material in place. The door is provided with a handle 15 upon the front side thereof and bifurcated lugs 16 along the edges thereof. The casing 10 is also provided withbifurcated lugs 17 in which rods 18 carrying wing nuts 19 are pivoted. Links 20 are pivoted in lugs 21 on the outside of the door and are connected by pivot pins 22 to the lugs. Hinges 23 connected by pins 24 to the links 20 at one end I are connected at their other ends to the lugs 25 on the casing 10 by means of the pins 26. The upper and lower ends of the door are provided with lugs 27 which carry guide pins 28. 29 that have guide slots 30 whose entry ends flare outwardly. The edges of the door are provided with gaskets 31 set in dovetailed groovesv in the door. .An opening 32 in the furnace or other wall is indicated, in proximityto which the door may be mounted.

h Thjoperation is as follows: Thedoor 11 ing to like parts in Figs. 1 to 4 are The casing 10 is provided with guides.

1926. Serial No. 100,048.

is swung into position in'front of the 0 ening 32, so that the pins 28 at the top and ottom of the edges of the door, respectively, enter the guide slots 30 in the guides 29, and when the door has been moved to its closin position, the rods 18 pivoted on the lugs 1 are moved within the bifurcated ends of the lugs 16, and the wing nuts are screwed down to fasten the door in place. When it is desired to 0 en the door, the wing nuts are loosened, t e rods 18 are swung away from the door and the door pulled straight outwardly, with the pins 28 riding in the guide slots 30, and may then be swung into the position shown in'Fig. 3. By using guiding means as just described, it will be seen that the door 'is'actually guided into and out of position in the opening in the casing. This will avoid damage to the door and also to the sides of the opening.

In the modification shown in Figs. 5 and 6, instead of havin the door fastened in position by means 0 the wing nuts, the door is held in position b means of beveled lugs. The parts shown in igs. 5 and 6 corres 0ndesignated by reference characters with primes, so that it is not thought necessary to describe the same again in detail. In addition, the sides of the door 11' are 'rovided with lugs 35 that have beveled aces 36. Catches 37 are attached by bolts to the easing 10, and are provided with sloping faces 38 on their upper sides, against which the sloping faces on the lugs, 35 come into contact. A cam 39 on the shaft 40 mounted in bearings 41 at the bottom of the casing 10' is operated by the handle 42 to lift the door, so that the. lugs 35 will assume the positionsindicated in dotted lines in Fig. 6,. the length of the pin 22' and thedistance between the lugs 21 being sufficient to permit this vertical movement of the door, after which the door can be swung open, as indicated in dotted lines in Fig. 5. In both modifications above described, the links 20 and the links 20 make the door movable horizontally from it's hinge pivot, so that the door can be adjusted horizontally just before it has .been moved to its clos position.

v 9, in which parts similar to those already described, are shown with the same reference v characters, with the subscript 1, the rod 45 lpasses loosely through the lugs 46 on the door.

ugs 47 are loosely mounted upon the rod and are connected to the toggle members 48 which are hinged by means of the lugs 49 upon the pivot rod 50 that is mounted in lugs 51 on the casing 10 this arrangement forming a lazy tongsdevice, exemplifying an expansible connection between the door and the ivot. p In the modification shown in Figs. 7, 8 and 9, when the handle 42 of'the cam '39 is turned, the door 11 is lifted as shown in dotted lines in Figs. and 9, so that the lugs 35 can move past the lugs 37 and the door can swing outwardly and then to the left, as shown in dotted lines in Fig. 7. Since the upper lugs 49 of the toggle rests upon the up-. per-slug 51 of the casing 10 and the upper lug 46 of the door 11 rests upon the upper lug 47 of the toggle, the door will be /prevent ed from movin downwardly, and since the lower lug 49 o the toggle is loose upon the oted together, means to move said door lengthwise of one of said pivots, and locking means operated by said movement.

6. In combination, a furnace casing having an opening therein, a door adapted to close said opening, pivots on said casin and on said door, a connection between said pivots and comprising a plurality of members pivoted together, a cam on said casing and adapted to move said door lengthwise of one of said pivots, and cooperating locking members on said casing and door and brought into and out ofrooperative relation by said movement.

7 In combination, a casinghaving an opening therein surrounded by outwardly extending flanges, a door adapted to close said opening, a pivot on said casing, a second pivot on said door, and a plurality of hinge members pivoted together and connecting said pivots.

BENJAMIN B. WHITTAM.

rod 50, and the lower lug 47 of the toggle is loose upon the rod 45, the toggle is permitted to collapse and move the door parallel to the rear wall of the casing 10 so that the door can be opened without the necessity of swinging the same outwardly beyond the edges of the furnace wall, thedoor being substantially within the limits of the flanges ofthe casing during its entire movement.

I claim:

1. In combination, a casing having an opening therein, a door adapted to close said opening, pivots on said door and said casing, and

"a lazy tongs device connecting said pivots.

2. In combination, a casing having an opening therein surrounded by outwardly extending flanges, a door adapted to close said opening, a pivot on said casing and within said flanges, and anexpansible connection be- ,tween said pivot and said door.

3.. In 1combination,. a casing having an opening therein surrounded by outwardly" extending flanges, adoor adapted to close said opening, pivots on said door and said. casing within said flanges, and an expansible connection between said pivots whereby the door may operate substantially within the limits of said flanges.

4. In combination, a casing having an openin therein surrounded b outwardly extendmg flanges, a door adapte to close said opening, a pivot on said casing within said flanges, and'a hinge connecting said door tosaid pivot.

5. In combination, a furnace casing having an opening therein, a'door adapted toclose sa d open ng, plvots on said casin and on said door, a connection between sald pivots and comprising a plurality of members pivice 

